Page 82 AD-4402
8.3.
8.3.8.3.
8.3. Built-in Current Loop
Built-in Current LoopBuilt-in Current Loop
Built-in Current Loop Output
Output Output
Output
Transmission system EIA RS-232C, Asynchronous, bi-directional, half-duplex
Current 1 = 20mA, 0 = 0 mA, external DC current source
Data length 7 bis
Start bit 1 bit
Parity bit Even
Stop bits 1 bit
Baud rat e 600 bps, 12000 bps, 2400 bps
Code ASCII code
8.3.1.
8.3.1.8.3.1.
8.3.1. Connection
ConnectionConnection
Connection
The current loop output has not polarity.
Use an external DC current source.
Connect the FG terminal when using the shield cable.
8.3.2.
8.3.2.8.3.2.
8.3.2. Communication Modes
Communication ModesCommunication Modes
Communication Modes
There are the following modes.
Stream Mode
The data is output at every update of display. If the data can not output due to slow
baud rate completely, data is output at next update.
Auto Print Mode
The data is printed at batch finish and recipe finish automatically.
Manual Print Mode
When the preset print key or terminal is pressed , data is output.
Accumulation Print Mode
When accumulating it or canceling the last result, the result of batch finish and recipe
finish is printed. When canceling the last result, the inverse polarity data is output.
Current loop Output
RS-485
A
B
SG
C.LOOP
FG Shield
Current loop Output
A
D-4402 inside
The CURRENT
LOOP terminals
have not polarity.